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The Cogl context has now a feature_flags_private enum that will allow us to query and use OpenGL features without exposing them in the public API. The ARB_fragment_program extension is the first user of those flags. Looking for this extension only happens in the gl driver as the gles drivers will not expose them. One can use _cogl_features_available_private() to check for the availability of such private features. While at it, reindent cogl-internal.h as described in CODING_STYLE.
150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifndef __COGL_CONTEXT_H
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#define __COGL_CONTEXT_H
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#include "cogl-internal.h"
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#include "cogl-context-driver.h"
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#include "cogl-primitives.h"
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#include "cogl-clip-stack.h"
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#include "cogl-matrix-stack.h"
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#include "cogl-material-private.h"
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#include "cogl-atlas.h"
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#include "cogl-buffer-private.h"
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#include "cogl-bitmask.h"
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typedef struct
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{
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GLfloat v[3];
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GLfloat t[2];
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GLubyte c[4];
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} CoglTextureGLVertex;
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typedef struct
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{
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/* Features cache */
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CoglFeatureFlags feature_flags;
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CoglFeatureFlagsPrivate feature_flags_private;
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gboolean features_cached;
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CoglHandle default_material;
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/* Enable cache */
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unsigned long enable_flags;
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guint8 color_alpha;
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gboolean enable_backface_culling;
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CoglFrontWinding flushed_front_winding;
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gboolean indirect;
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/* A few handy matrix constants */
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CoglMatrix identity_matrix;
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CoglMatrix y_flip_matrix;
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/* Client-side matrix stack or NULL if none */
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CoglMatrixMode flushed_matrix_mode;
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GList *texture_units;
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/* Materials */
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CoglHandle simple_material;
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CoglHandle source_material;
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/* Textures */
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CoglHandle default_gl_texture_2d_tex;
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CoglHandle default_gl_texture_rect_tex;
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/* Batching geometry... */
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/* We journal the texture rectangles we want to submit to OpenGL so
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* we have an oppertunity to optimise the final order so that we
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* can batch things together. */
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GArray *journal;
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GArray *logged_vertices;
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GArray *polygon_vertices;
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/* Some simple caching, to minimize state changes... */
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CoglHandle current_material;
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unsigned long current_material_flags;
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CoglMaterialFlushOptions current_material_flush_options;
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GArray *current_layers;
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/* Bitmask of texture coordinates arrays that are enabled */
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CoglBitmask texcoord_arrays_enabled;
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/* These are temporary bitmasks that are used when disabling
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texcoord arrays. They are here just to avoid allocating new ones
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each time */
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CoglBitmask texcoord_arrays_to_disable;
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CoglBitmask temp_bitmask;
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/* PBOs */
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/* This can be used to check if a pbo is bound */
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CoglBuffer *current_pbo;
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/* Framebuffers */
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GSList *framebuffer_stack;
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CoglHandle window_buffer;
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gboolean dirty_bound_framebuffer;
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gboolean dirty_gl_viewport;
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/* Primitives */
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CoglHandle current_path;
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CoglHandle stencil_material;
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/* Pre-generated VBOs containing indices to generate GL_TRIANGLES
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out of a vertex array of quads */
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CoglHandle quad_indices_byte;
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unsigned int quad_indices_short_len;
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CoglHandle quad_indices_short;
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gboolean in_begin_gl_block;
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CoglHandle texture_download_material;
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CoglAtlas *atlas;
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CoglHandle atlas_texture;
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/* This debugging variable is used to pick a colour for visually
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displaying the quad batches. It needs to be global so that it can
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be reset by cogl_clear. It needs to be reset to increase the
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chances of getting the same colour during an animation */
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guint8 journal_rectangles_color;
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/* Cached value for GL_MAX_TEXTURE_UNITS to avoid calling
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glGetInteger too often */
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GLint max_texture_units;
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CoglContextDriver drv;
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} CoglContext;
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CoglContext *
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_cogl_context_get_default ();
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/* Obtains the context and returns retval if NULL */
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#define _COGL_GET_CONTEXT(ctxvar, retval) \
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CoglContext *ctxvar = _cogl_context_get_default (); \
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if (ctxvar == NULL) return retval;
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#define NO_RETVAL
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#endif /* __COGL_CONTEXT_H */
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